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Contract OI history

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Oct 30, 2026 EXPIRATION

MSFT $542.50 Put

MSFT261030P00542500

Latest saved OI100Oct 23, 2026
Last change-3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $542.50 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 103510 2026-10-09: 0 OI2026-10-13: 57 OI2026-10-14: 57 OI2026-10-15: 57 OI2026-10-16: 71 OI2026-10-21: 103 OI2026-10-23: 100 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

MSFT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing100-3
Oct 21, 2026103+32
Oct 16, 202671+14
Oct 15, 2026570
Oct 14, 2026570
Oct 13, 202657+57
Oct 09, 20260No prior observation